Kerviel's aunt Sylviane Le Goff, 80, said: "He is carrying the can. They should be questioning others in high positions."

A senior bank executive admitted Kerviel - set to be charged today - may not have acted alone. Jean-Pierre Mustier said: "I can't guarantee there was no complicity." He admitted Kerviel may have risked £37billion - more than the bank's value.